Mechanism for operating coal-augers.



T. w. DAVIS. MECHANISM FOR OPERATING COAL AUGERS. APPLICATION FILEDNOV-23, I915. L1,%%L Patented May16,1916.

3 SHEETS-SHEET L T. W. DAVIS.

MECHANISM FOR OPERATING COAL AUGEHS. APPLICATION FILED HOV-23, l9l5.

LWSAM. Patented Mag 16,1916.

3 SHEETSSHE ET 2- attomw THE COLUMBIA I'LANOGRAPH co., WASHINGTON, n. c.

T. W. DAVIS. MECHANISM FOR OPERATING COAL AUGERS.

APPLICATION FILED NOV-23. IBIS.

. M 6 I Mn I M w. m I a w 3 L M w I w THOMAS W. DAVIS, OF HONAKER,VIRGINIA.

MECHANISM FOR. OPERATING COAL-AUG-ERS.

Specification of Letters Patent.

Patented May 16, 1916.

Application filed November 23, 1915. Serial No. 63,031.

To all whom it may concern:

Be it known that I, THOMAS W. DAVIS, a citizen of the United States,residing at Honaker, in the county of Russell and State of Virginia,have invented new and useful Improvements in Mechanism for OperatingCoal-Angers, of which the following is a specification.

This invention relates to mining machinery and more particularly tomechanism for operating coal augersand the like and the principal objectof the invention is to provide simple and efficient mechanism fordriving the auger and effectively feeding it in either direction.

Another object of the invention is the provision of an auger drivingmechanism which is so constructed that the auger may be driven into thework at a proper rate of speed and withdrawn from the work rapidly so asto avoid loss of time and to prevent chips and dirt from remaining inthe drill hole.

Still another object of the invention resides in the provision of adevice of the character described so adapted to the stoping bar that itmay be adjusted and operated to drive the auger at any angle.

Further objects of this invention will appear as the following specificdescription is read in connection with the accompanying drawings whichform a part of this application, and in which Figure 1 is a frontelevation showing the stoping bar in vertical position and the partsarranged for horizontal drilling. Fig. is a rear elevation. Fig. 3 is aside elevation.

' Fig. 1 is a top plan view with the stoping bar in section. Fig. 5 is avertical sectional view taken on the line 5-5 of Fig. 1. Fig.

6 is a horizontal section taken on the line 66 of Fig. 2. Fig. 7 is adetail vertical section on the line 7--7 of Fig. 1.

Referring more particularly to the drawings, 1 represents a stoping bar,the sepa- 0 while the other end is arranged to receive -as will behereinafter described.

the adjusting screw 5 actuated by the wheel 6 so as to enter a wall orthe floor as will be readily understood. The leg 2 of the bar ispreferably provided with suitable notches 7, the purpose of which willbe hereinafter described.

Slidably mounted between the legs 2 and 3, is a mounting head 8 havingsecured thereto, by means of the bolt 9, the guide yoke 10 whichsurrounds the legs, as shown. The bolt 9 also serves the purpose ofconnecting the head 8 to the carrier 11 and fur ther holds a guide blockin proper position, The head 8 is maintained in adjusted position uponthe stoping bar by means of a spring actuated locking dog 12 slidablymounted in a bracket 13 formed on the head 8, as shown. The dog 12 isadapted to engage the notches 7 in the leg 2 and is withdrawn from saidnotches by the actuation of the lever 14: which is connected to the dogby a link 15 and is supported upon a pivotally mounted bar 16 carried bythe head. The bar is connected to the head in this manner so as topermit of its being drawn downwardly when it is necessary to positionthe stoping bar close to the ceiling or a side wall and is held inalinement with the bracket and at right angles to the stoping bar byremovable pins 17 Also formed upon the head 8 is a second bracket 18having slidably mounted therein a spring pressed locking dog 19controlled by a lever 20 connected thereto through the link 21. This dogis adapted to engage suitable recesses or notches formed in the upperand inner arcuate side 22 of the carrier 11, so as to hold the carrierat any suitable angle relative to the stoping bar.

The carrier 11 comprises the side plates 22 and 23, connected togetherat their upper and lower ends by the bridge pieces 24 and 25,respectively, and each side plate is formed with suitable guide ways 26in which is slidably mounted the drillshaft carrying frame generallyindicated at 27. This frame comprises the side bars 28 and 29 connectedtogether at opposite ends by the heads 30 and 31, and arranged uponopposite sides of 100 the guide block 32 which, as before stated, isheld in proper position by the bolt 9.

Journaled in bearings carried by the heads 30 and 31 is a drilloperating shaft 33 which may be turned by the crank 34 or in any othersuitable manner and which carries upon its outer end any suitable typeof drill or auger chuck 35. The shaft 33 has keyed thereto a pinion 36which meshes with a similar pinion 37 secured to the end of the screwshaft 38 also journaled in bearings carried by the heads 30 and 31. Thepinion 37 is in mesh with a relatively large gear 39 keyed to the end ofa screw shaft 40 and both of these screw shafts are arranged in parallelrelation and upon sides of the guide block 32 against which they havesmooth bearing.

Mounted upon opposite sides of the guide block and connected together bypins 41 extending through said block are the half nuts 42 and 43, thelatter of which is adapted to engage the shaft 38 and mesh with thethreads thereon and the former of which is adapted to engage the shaft40 and mesh with the threads thereon. The nuts are so arranged that whenone is in engagement with its respective shaft, the other is out ofengagement with its shaft. These blocks are operated by a bell cranklever 44 connected to the upper block 42 by means of hinged links 45.The lever operates over a segment 46 and is provided with the usualactuating spring dog 47 engaging notches in the segment to hold it inadjusted position. It will be noticed that the shaft 38 will travel atthe same speed as the crank shaft 33 and the shaft 40 is turned at aconsiderably lower speed and thus it will be seen that a positive butslow feed of the auger is obtained when the nut 42 is in engagement withthe shaft 40, while a positive and rapid retraction of the drill may beobtained when the nut 43 is in engagement with the shaft 38.

In the operation of the device, the stoping bar is secured between sidewalls or between ceiling and floor in the usual manner and the carrieradjusted so as to incline the auger fast whereby the auger 48 may be fedtoward the work at the proper angle. The parts are held in adjustedposition by the dog 19. The nuts 42 and 43 are then shifted so as tobring the nut 42' into mesh with the shaft 40 and to carry the nut 43out of mesh with the shaft 38. By rotating the crank, the auger 48 isproperly rotated to cut into the coal or other substance and is also fedforward into the coal at a proper rate of speed. When the hole has beendrilled to its proper depth, the lever 44 is shifted so as to .releasethe nut 42 from the shaft 40 and to bring the nut 43 into engagementwith the shaft 38. Rotation of the crank in the same direction as indrilling will cause the rapid rotation of the shaft 38, therebyproducing an equal withdrawal of the drill. This not only saves time,but it has been found in practice that the rapid rotation of the drilland its rapid withdrawal, will cause all chips or'particles of coal dustto be removed from the coal so that the danger from coal dust fires isgreatly reduced.

It is to be understood that I preferably have all bearings on the mainand reserve shafts supplied with antifriction bars and arranged theparts so that they may be conveniently driven by a motor. I also wish itunderstood that this device may be used equally well for drilling rockby using diamond pointed bit and that the speed of the machine maybereadily varied by changing the size of the gear wheels.

What is claimed is 1. In a device of the class described, including arotatably mounted-carrier, a frame slidably mounted in the carrier, anon-displaceable drill shaft journaled in the carrier, means forrotating the drill shaft, feed screws journaled in the frame andactuated at diiferent speeds in opposite directions by the rotation ofthe drill shaft in one direction, nuts connected to the carrier, andmeans for independently engaging the nuts with the feed screws.

2. In a device of the class described, including a rotatably mountedcarrier, a frame slidably mounted in the carrier, a non-displaceabledrill shaft journaled in the carrier, means for rotating the drillshaft, feed screws journaled in the frame and actuated at differentspeeds in opposite directions by the rotation of the drill shaft in onedirection, nuts connected to the carrier, means for independentlyengaging the nuts with the feed screws, and bearings for the feed screwsopposed to the nuts.

3. In a device of the class described, including a rotatable mountedcarrier, a frame slidably mounted in the carrier on opposite sides ofthe bearing member, a non-displaceable drill shaft journaled in theframe, feed screws journaled in the frame, an intergeared connectionbetween the shaft and screws whereby said screws are rotated atdifferent speeds and in opposite directions, connected nuts arrangedupon opposite sides of the bearing member and adapted for engagementwith the screws, and means for throwing either nut into engagement withits respective screw and disconnecting the other nut from its respectivescrew.

4. In a device of the class described, including a rotatably mountedcarrier, a frame slidably mounted in the carrier, a drill shaftrotatably mounted in the frame, a bearing movable with the carrier andarranged between the sides of the frame, feed screws

